Steel racking with mass 100 lb and surface area 50 ft2 is used to carry products into a batch dry...
Steel racking with mass 100 lb and surface area 50 ft2 is used to carry products into a batch drying oven at 500 F. The combustion efficiency of the oven is 70%. The specific heat of steel is 0.12 Btu/lb-F, and the convection coefficient is 2 Btu/hr-ft2-F. If the racking enters the oven at room temperature of 70 F and the drying process takes 0.25 hours, calculate the exit temperature of the racking, and the heat and fuel energy loss to the racking with each drying cycle.
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Steel racking with mass 100 lb and surface area 50 ft2 is used to carry products into a batch dry...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow rate is 1,000 cfm, the humidity ratio is 0.025 lbv/lba, and the dry air density is 0.072 Iba/ft3. b. Assume the above air enters an evaporator coil at 90°F where it is cooled in a constant humidity ratio process until reaching the 100 % RH curve ( the temperature at that point is the dew point. The air then keeps dropping in temperature, following...
a. Calculate the dry air and water vapor mass flow rates (lb/min) if the volume flow rate is 1,000 cfm, the humidity ratio is 0.025 lbv/lba, and the dry air density is 0.072 Iba/ft3. b. Assume the above air enters an evaporator coil at 90°F where it is cooled in a constant humidity ratio process until reaching the 100 % RH curve ( the temperature at that point is the dew point. The air then keeps dropping in temperature, following...
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